Valve for compressors.



No. 688,392. I Patentad Dec. I0, 190i.

H V CONRAD VALVE FOB COMPBESSURS. (Application filed Aug. a, 190i.

2 Sheets-Sheet I.

(No Model.)

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No. 688,392. Patented Dec. In, 1901.

H. v. comma.

VALVE FOB GOMPRESSOBS.

(Applicaticn filed Aug. 3, 1901.) (No Model.) 2 Sheats$heet 2.

WITNESSES NEY5 I v 7\ r I U v f' M I mATT flmo UNITED STATES PATENTOFFICE.

HUGH V. CONRAD, OF TARRYTOWN, NEW YORK, ASSIGNOR TO RAND DRILL ICOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

VALVE FOR COMPRESSORS'.

SPECIFIC AT10N formingpart of Letters Patent No. 688,392, dated December10, I901.

' Applicationfiled Au ust 3,1901. Serial No. 70,700. on model.)

To all whom it may concern:

Be it known that I, HUGH V. CoNEAD,a citizen of the United States ofAmerica,and a resident of Tarrytown,'in the county of Westchester andState of New York, have invented certain new and useful Improvements inValves for Compressors, of which the following is a specification,reference being hadto the accompanying drawings, forming a part thereof.

My invention consists in providing a split bushing, each member of whichis adapted to partially embrace the valve-stem of a valve and to form aguide therefor, one member of which is provided with an extension havinga valve-seat therein to which the valve carrying the said valve-stem isfitted.

The main object of my inventionis to pro 'vide a bushing having a guidetherein for a valve-stem and having a valve-seat integral therewith intowhich a valve-disk, stem, and stem-headrformed integrally in one piecemay be inserted to be carried and guided thereby.

My invention further consists in certain novel details of constructionand combination of parts, as will hereinafter more fully appear, andother advantages will also appear hereinafter.

I will now proceed to-describe a valve embodying my invention and willthen point out the novel features in claims.

In the drawings, Figure 1 is a central transverse sectional elevation ofa valve embodying my invention, together with a portion of the casing ofa compressor. Fi-gs. 2and 3 are views in horizontal or transversesection of the same, the sections being taken substantially upon theplane of the lines 2 2 and 3 3 of Fig. 1. Fig. 4: is a detached View inperspective of my improved bushing with its two members separated ordisassociated. Fig.5 is a view in side elevation of a valve-disk, stem,and head formed in one integral piece.

In Fig. 1 a portion of the casing of a com pressor is shown anddesignated by the reference character 6. The casing is provided withsuitable inlet-passage 7 and chamber 8. The chamber 8 is interiorlyscrew-threaded at 9 to receive a bushing. The bushing herein comprisestwo members, one designated by the reference character 10 and the otherseat 14 therein,and to which is fitted the valve disk carrying the saidstem. The bushing member 10 is provided with suitable recesses 15, andthe bushing member 11 is provided with corresponding projections 16, sothat when the two members are assembled theywill be interlocked. Each ofthe members 10 and 11 carries one-half of a set of screw-threads inaddition to the screw-threaded extension 13, which is carried by themember 10. 'The bushing as a whole is fitted to the chamber 8 of thecasing, and the screw-threaded portion thereof engages thescrew-threaded portion 9 of the casing before referred to. When thus inposition in the casing, the two members of the bushing are securel ylocked together and cannot move independently of each other. Forconvenience in holding the parts together before they are inserted intoposition a ring 17 is employed, which surrounds the upper portion of thesaid bushing, forming the valvestem guide. This ring will also serve toprevent the upper end of the said bushing from springing apart after thesaid bushing has which are clearly illustrated in Fig. 5 of thedrawings. and separated from the bushing, are preferably formedintegrally in one piece or the various parts are rigidly securedtogether, so that, in effect, they are one integral piece. The saidvalve-disk, stem, and head may be inserted into position with thevalvedisk 18 in proximity with its seat 14, the stem 19 in the guide 12,and the head 20 above or beyond the end of the said guide by firstdisassembling the bushing members, by then in serting the stem and headthrough the-extension 13 of the disk member 10 until the parts are intheir proper relative positions, by then too reassembling said bushingmembers, and lastly by inserting ring 17 in place, so as to prevent anaccidental relative displacement of the said members. A spring 21 isprovided, the said spring being of the compression type and hearing atone side against a shouldered portion of the said bushing and at theother side against the under side of the said stemhead. The normaltendency of the spring 21 is to keep the valve-disk 18 up to its seat14.. The spring 21 may be inserted into place by winding it over thestem-head 20, the spring being rotated, and thereby gradually drawingitself into posit-ion as if it Werea screw turning upon the stem-head 20as a nut.

It is exceedingly advantageous to supply the valve-disk, stem, and headin one integral piece where the valve is to be employed as aninlet-valve for a compressor, and particularly where the valve is to beemployed as the inlet-valve on the high-pressure side of a compoundair-compressor. This is for the reason that it has been found in actualpractice that if the valve-disk, stem, and head he made of separateparts they are very likely to become loose,owing to the pounding andjarring which they receive. It is also desirable that the guide for thestem and the valve-seat be in one integral piece, for otherwise it isexceedingly hard to procure and maintain the correct alinement sonecessary for a proper working of the valve. In my inventionhereinbefore set forth I have attained these results in a very simpleand efiective manner.

It will of course be understood that various modifications of my devicemay be resorted to within the spirit and scope of my invention, and I donot wish, therefore, to be limited only to the precise constructionherein shown and described.

What I claim is 1. In a valve for compressors or the like, thecombination with a valve-disk, stem, and stem-head, of a split bushingcomprising two members, each having a,pertion adapted to partiallyembrace the said valve-stem, and together to form a guide therefor, oneof the said members provided with an extension having a valve-seattherein for the said valvedisk.

2. In avalve for compressors or the like, the combination with avalve-disk, stem and stemhead, of a split bushing comprising twointerlocked members, each having a portion adapted to partially embracethe said valve-stem, and together to form a guide therefor, one of thesaid members provided with an extension having a valve-seat therein forthe said valvedisk.

3. In a valve for compressors or the like, the combination with avalve-disk, stem and stemhead, of a split bushing comprising two members10 and 11, each of the members screwthreaded at one portion throughoutan arc of substantially one hundred and eighty degrees, and each havinga portion 12 forming substantially one-half of a guide for said stem,and one of said members provided with a screw-threaded extension 13,havinga valveseat 14 therein for the said valve-disk.

4. The combination with the casing of a compressor or the like, saidcasing having a screw-threaded portion, of a split bushing comprisingtwo members together provided with a threaded portion adapted to engagethe screw-threaded portion of the said casing, each of said membershaving a portion adapted to partially embrace a valve-stem, and togetherto form a guide therefor, and one of said members provided with anextension having a valve-seat therein, together with a combinedvalve-disk, stem and head.

5. The combination with the casing of a compressor or the like, saidcasing having a screw-threaded portion, of a split bushing comprisingtwo interlocked members together provided with a threaded portionadapted to engage the screw-threaded portion of the said casing, each ofsaid members having a portion adapted to partially embrace a valvestem,and together to form a guide therefor, and one of said members providedwith an extension having a valve-seat therein, together with a combinedvalve-disk, stem and head.

HUGH V. CONRAD.

Witnesses:

J. ALBERT EARL, WILLIAM S. BARNUM.

